diff --git a/App/lib/core/BuildPipeline.vp b/App/lib/core/BuildPipeline.vp
index 491d7ef..c40a14f 100644
--- a/App/lib/core/BuildPipeline.vp
+++ b/App/lib/core/BuildPipeline.vp
@@ -638,10 +638,17 @@ def run_llc_parallel(tasks: bytes, task_count: int, max_threads: int) -> int:
         j = 0
         while j < batch_n:
             th_j: vthreading.Thread | t.CPtr = th_list.get(j)
+            #region debug-point LLC9
+            stdio.printf("[LLC-DBG2] j=%d ptr=%llx handle=%llx started=%d\n", j,
+                         t.CUInt64T(th_j), t.CUInt64T(th_j.handle), th_j.started)
+            #endregion
             #region debug-point LLC7
             stdio.printf("[LLC-DBG] join 前 %d\n", j)
             #endregion
             th_j.join(600000)
+            #region debug-point LLC10
+            stdio.printf("[LLC-DBG2] j=%d alive=%d\n", j, th_j.is_alive())
+            #endregion
             #region debug-point LLC8
             stdio.printf("[LLC-DBG] join 后 %d alive=%d\n", j, th_j.is_alive())
             #endregion